A critical system update released on Tuesday (a vulnerability effecting all OS versions except 64 bit Windows 7) was first reported to be causing BlueScreen of Death on some XP systems:
Windows Updates Cause BSOD on XP Systems
However, developments throughout the day increasing indicate that the affected systems are ones suffering from a rootkit infection. The increasingly interesting replies to
Brian Kreb's article are quite informative.
One
commenter said:
Many of the replies are very informative.
Just a while ago, Krebs posted an update:
Rootkit May Be Culprit in Recent Windows Crashes
Among the replies I found a link to a more technical article (Nov. '09) about this type of rootkit and how it can be removed:
[TDL3 Rootkit] New Rootkit on the loose ...
Kaspersky fans will be happy to hear that one replier, joemessman, was able to detect and remove the rootkit with Kaspersky's TDSSKiller.
He also reported his testing showed that none of the following where able to detect it:
* F-Secure Blacklight
* RootkitRevealer
* Windows Malicious Software Removal Tool
* ProcessGuard
* Rootkit Hunter (Linux and BSD)
And I found it highly interesting that one replier reported that this rootkit is VM-aware and won't install itself on a virtual machine.